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From: bill@thd.tv.tek.com (William K. McFadden)
Newsgroups: sci.electronics
Subject: Re: L-R output for center front car speaker
Message-ID: <9300@sail.LABS.TEK.COM>
Date: 8 Apr 91 22:36:42 GMT
References: <1486@lehi3b15.csee.Lehigh.EDU>
Sender: root@sail.LABS.TEK.COM
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Organization: Tektronix TV Products
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In article <1486@lehi3b15.csee.Lehigh.EDU> tbrown@lehi3b15.csee.Lehigh.EDU (Thomas Brown [901015]) writes:
>What is the best way to obtain a difference output (L-R) from separate
>L and R outputs (about 12W/channel) without damaging the power amplifier
>in the radio?  If this is a problem, a sum output (L+R) would also be
>acceptable, but the difference output would enhance the overall stereo
>effect in the system.

First, make sure the amplifier does not have a bridged output.  Check
with an ohmmeter to make sure the - speaker terminals are connected to
ground.  Most car radios work this way, but ones labelled "high power"
usually have bridged outputs.

If your radio does not have bridged outputs, connect the center speaker
between the + speaker terminals of the radio.  Tune the radio to a mono
signal, and adjust the balance control for minimum output from the
center speaker.

I did this with my mom's car, and it worked great.

Disclaimer:  If you do this and it causes your radio to and catch fire,
burning you and your passengers to death, don't come crying to me!
-- 
Bill McFadden    Tektronix, Inc.  P.O. Box 500  MS 58-639  Beaverton, OR  97077
bill@videovax.tv.tek.com,     {hplabs,uw-beaver,decvax}!tektronix!videovax!bill
Phone: (503) 627-6920                 "SCUD: Shoots Crooked, Usually Destroyed"